Grinding machine

ABSTRACT

Grinding machine with a provision for setting up grinding cycle parameters and then locking them in the selected condition so that they are not accessible to the normal operator.

v United States Patent [191 [11'] 3,820,287 Klar et al. June 28, 1974 GRINDING MACHINE [56] References Cited [75] Inventors: John Klar, West Boylston; Robert TED STATES PATENTS H. Lizotte, Leom n both of 3,341,980 9/1967 Klar 51/1659 Mass. 3,400,677 9/1968 Bowers 318/162 X Assigneez Cincinnati Milacron-Heald p. 3,599,376 8/1971 Renner 51/1659 Worcester Mass Primary Examiner-I-Iarold D. Whitehead [22] Filed: Mar. 27, 1972 Attorney, Agent, or Firm-Norman S. Blodgett; Gerry 21 Appl. No.: 238,395 Blodge ABSTRACT [52] Cl 51/165 5 1/ Grinding machine with a provision for setting up 51 I t Cl B24b 51/00 grinding cycle parameters and then locking them in *5 i 71 165 77 the selected condition so that they are not accessible to the normal operator.

9 Claims, 52 Drawing ELECTRICAL SYSTEMS MODULAR LOAD DRESS TOR 39 CHUCK M SETUP I MANAGE- 38 NO MIST TOR PULSE UP-DOWN 4o DOWN PULSER/ TIMER COUNT COUNTER MEMORY LOGIC PUT ACE

MOTOR 9 STEPPING MOTOR POWER STARTERS MAIN DRIVE 2 WORKHEAD WHEELHEAD SIZE DIRECT C I l i I I l l l I l J I I I l 1 l 1 I I Figures PATEN'IEDJUHZB I974 3820.287.

' DRIVER I 34 ELECTRICAL SYSTEMS MODULAR CONSTRUCTION I J l I l F l CYCLE IN0IcAToR PUSH BUTTON I LOGIC I" PANEL STAII'IQM GAGE I R0 I B' "BOARDS |sI IPoREss.. LOAD INDICATOR I39 E SE BoAR0sI,2 l?,l8 ICOUNTERI METER LIGHTS I I TR TABLE FEEDBACK CHUCK SETUP I 4ANAGE h FEED 23583 9 2 IJOUURNNIEEIQR METER CONTROLS I MENT LOGIC 38 I S'; 'S%' gE I N0 MIsT OPERATOR I PULSE UP-DOWN 40 l 8.9,l0 BOARD 22 I FILTER LUB.LIGHT CONTROLS/ITO STEP COUNTER IFINAL sIzE DIAMOND POWER ON 46 I, DOWN COUNTER I I I- gR D 23 L'GHT I0 1 COUNTER MEMORY 42 "I WHEELWEAR Sg |6I LOGIC |BOARD l3 24,25,26 50 B'I TIMER OUTPUT l COUNT -|NTERFACE- SELECTOR 45 I MOTOR l l I I5 STEPPING MOTOR II .WI '2 2 II I I I I POWER I SLIDE CONTROL L P osITIoM I "I I l I STARTERS i I I NEW WHEEL l I l I MAIN DRIVE I I HEELSIZE WORKHEAD I I EELWEAR I I I WHEELHEAD: I I l=A 3K0FF I INTERFACE IST. sIzE I BUFFERS I I I 3| I I I I DIRECT L l CONTACT 1 SWITCHES PATENIEEHIIII 28 I374 mm 02 or 4o No MIsT LUBE SLIDE COURSE WHEEL WHEEL RESET DRECDSS S6 INQEDAR S SLIDE POSITION 0 COURSE WHEEL WHEEL SIT DRESS SIZE WEAR REss FINAL No Q C D QD .SLIDE FINISH N0 BACK RKOUT PART MER TIMER oss sLIDE KNO BACK SKI Au DR CHG D. TABLE TABLE FIRST D ON FILT IN OUT sIzE O O O C) C) CHG.HYD. FILTER FINISHING SPA TIMER T CR CYCLE INTERLOC PART HAND OFF ON CYCLE T OFF AUTO. OFF ON GRIND O s I z E DREgSER cRoss SLIDE coNTRoL AUTO OFF AUTO (3 LE SETUP DowN FEED FEEDBACK LIMIT sEc.sIzE

REsET FEED LOW HI .OOI DIA. .OOI DIA..0 A..ooI DIA.

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PATENTEDJUH28 1914 31820.28?

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SIEEI 19 II? 4o BOARD EJECTOR 8 FIRST SIZE W |9 GAGE RELEASE 9 INTERMEDIATE sIzE [:I8 LOW LIMIT FINAL SIZE HIGH LIMIT w :f; NEW WHEEL COMPENSATION SETUP 2% STANDARD COMPENSATION I: IST. SIZE RETRAcTIoN CI! 2ND. SIZE RETRACTION Z RATE COMMON I I I l I I 5 I COMPONENT [I H H H SIDE I 2 3 45 6 7 8 9IOII I2I3I4I5|6I7I8I9202l22 BOTTOM SIDE ABCDEFHJ KLMNPRSTUVWXYZ KEYWAY FIG. 4 

1. A grinding machine for generating a surface of revolution on a workpiece by use of an abrasive wheel, comprising: a. a base, b. a workhead mounted on the base for supporting and rotating the workpiece about the axis of the surface of revolution, c. a wheelhead mounted on the base for supporting and rotating the abrasive wheel about its axis, d. a feed box containing electrical circuitry for controlling relative movement of the workhead and wheelhead both parallel to and perpendicular ro the said axis of the surface of revolution in accordance with predetermined grinding parameters to produce a grinding cycle, the circuitry containing adjustable elements for setting the said parameters, e. a first circuit board means insertable in the feed box to render the said adjustable elements operative, and f. a second circuit board means insertable in the feed box to render the said adjustable elements inoperative and to substitute in the said electrical circuitry fixed elements in place of the adjustable elements.
 2. A grinding machine as recited in claim 1, wherein the second circuit board is insertable in the feed box in place of the first circuit board.
 3. A grinding machine as recited in claim 1, wherein the electrical circuitry is rendered normally inaccessible.
 4. A grinding machine as recited in claim 1, wherein the adjustable elements are always accessible, irrespective of whether they are operative or inoperative.
 5. A grinding machine as recited in claim 1, wherein the adjustable elements consist of resistors whose resistance can be adjusted in discrete steps, and wherein the fixed elements can be readily changed to have values corresponding to values to which the resistance of the adjustable elements have been adjusted.
 6. A grinding machine as recited in claim 5, wherein each adjustable element is associated with a particular function in the grinding cycle and there is a corresponding fixed element on the second circuit board to produce the same function.
 7. A grinding machine as recited in claim 6, wherein each fixed element consists of a series of resistors connectable by jumpers to produce a total resistance equal to the desired value equal to the value of the resistance in its corresponding adjustable element.
 8. A grinding machine as recited in claim 7, wherein a corresponding pair of adjustable element and fixed element is connected into the feed box electrical circuitry to control the functions of STANDARD COMPENSATION, FIRST-SIZE RETRACTION, and FINISH SPARK-OUT TIME.
 9. A grinding machine as recited in claim 8, wherein a said corresponding pair are also connected to control the functions of NEW WHEEL COMPENSATION, SECOND-SIZE RETRACTION, ROUGH SPARK-OUT TIME, FINISHING TIME, LOW-FORCE TIME, LOW FEEDBACK LIMIT, HIGH FEEDBACK LIMIT, SECOND SIZE, RATE NO. 1, and RATE NO.
 2. 